Method of manufacturing tin-plated copper terminal material
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United States of America Patent
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May 28, 2019
Grant Date -
Dec 6, 2018
app pub date -
Dec 14, 2016
filing date -
Dec 15, 2015
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Abstract
A method of manufacturing tin-plated copper terminal material as a terminal crimped to a terminal end of an electric wire made of an aluminum wire material, using a base member of copper or copper alloy in which galvanic corrosion is not easy to occur and an adhesiveness of a tin layer is excellent, the method includes: a zinc-nickel alloy layer forming step forming a zinc-nickel alloy layer having a nickel content of 5 mass % to 50 mass % inclusive and a thickness of 0.1 μm to 5.0 μm inclusive on a base member made of copper or copper alloy; and a tin-plating step forming a tin layer by tin plating on the zinc-nickel alloy layer; more preferably, following the tin-plating step, the method includes a diffusion treatment step diffusing zinc from the zinc-nickel alloy layer to the tin layer by maintaining at 40° C. to 160° C. inclusive for 30 minutes or longer.
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